Earth's Layers and Rock Cycle (Practice Problems)

Which of the following is the densest layer of the solid Earth?

• mantle

• core

• atmosphere

• crust

Rocks in the Earth's mantle contain a higher percentage of _______ and _______ than do rocks in the Earth's crust.

• iron and magnesium

• iron and silicon

• magnesium and oxygen

• silicon and oxygen

_______ rock is formed when debris is buried, compressed and cemented together.

• Sedimentary

• Metamorphic

• Magma

• Igneous

Most of the Earth's volume is contained in the _______.

• mantle

• outer core

• crust

• inner core

Earth is approximately 4.5 billion years old. Is it likely that any of the rocks that were on Earth's surface when it first formed are still in existence?

• Yes, Earth's surface has changed very little since Earth was first formed.

• Yes, rocks are very hard and should be able to survive for 4.5 billion years.

• No, most of Earth's magma did not solidify until 1 billion years ago.

• No, rock material is constantly recycled on Earth's surface through the rock cycle.

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NGSS.MS-ESS2-2

Which of the following is found in large quantities in the Earth’s crust?

• magnesium

• nickel

• iron

• silicon

What are the two main factors in the mantle that contribute to the rock cycle?

• layering and pressure

• heat and weathering

• weathering and layering

• pressure and heat

Tags

NGSS.MS-ESS2-1

Look at the diagram of the rock cycle below. Which part of the cycle is missing?

• sedimentation

• mineral integration

• melting

• crystallization

Tags

NGSS.MS-ESS2-1

The two most abundant elements in Earth's core are

• nickel and silicon

• iron and nickel

• silicon and oxygen

• iron and magnesium

Which two elements are the most abundant in the Earth's crust?

• silicon and oxygen

• silicon and magnesium

• iron and magnesium

• iron and nickel